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<p>Driven by the “dual carbon” goals, metallurgical regenerative heating furnaces face the need for efficient and low-carbon transformation. This paper conducts numerical simulations of the combustion process using an ammonia burner, based on a three-dimensional model and chemical kinetics mechanisms, to investigate the effects of excess air coefficient (<i>α</i>), baffle angle, and air preheating temperature on combustion characteristics and carbon emissions. The results indicate that the core reaction of ammonia combustion is dominated by the interaction between NH<sub>2</sub> and NO. When <i>α</i> = 1.15, NO<sub>x</sub> and NH<sub>3</sub> emissions (ppm, volume fraction, dry basis) are at their lowest, balancing energy utilization and pollution control. A baffle angle of 45° optimizes gas flow mixing efficiency, and when combined with <i>α</i> = 1.2, combustion stability is at its best. When the air preheating temperature is between 973&#xa0;K and 1073&#xa0;K, the concentration of pollutants&#xa0;(ppm, volume fraction, dry basis) in the combustion products is significantly reduced. This study provides data support for optimizing low-carbon processes in ammonia-based heat storage combustion for metallurgical heating furnaces.</p>

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Numerical Simulation of the Combustion Process of an Ammonia Burner in a Metallurgical Regenerative Heating Furnace and Optimization of Low-Carbon Emissions

  • 期刊论文

  • 发表日期：

    2026年2月4日

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  • Jiali Geng,
  • Xianchun Li,
  • Fanrui Meng,
  • Dinghan Song

摘要

Driven by the “dual carbon” goals, metallurgical regenerative heating furnaces face the need for efficient and low-carbon transformation. This paper conducts numerical simulations of the combustion process using an ammonia burner, based on a three-dimensional model and chemical kinetics mechanisms, to investigate the effects of excess air coefficient (α), baffle angle, and air preheating temperature on combustion characteristics and carbon emissions. The results indicate that the core reaction of ammonia combustion is dominated by the interaction between NH2 and NO. When α = 1.15, NOx and NH3 emissions (ppm, volume fraction, dry basis) are at their lowest, balancing energy utilization and pollution control. A baffle angle of 45° optimizes gas flow mixing efficiency, and when combined with α = 1.2, combustion stability is at its best. When the air preheating temperature is between 973 K and 1073 K, the concentration of pollutants (ppm, volume fraction, dry basis) in the combustion products is significantly reduced. This study provides data support for optimizing low-carbon processes in ammonia-based heat storage combustion for metallurgical heating furnaces.